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Russell Hopton as Det. Lt. Ted Mallory |
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Lola Lane as Kay Palmer |
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George F. Marion as Jim Gray |
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John St. Polis as Prof. Trowbridge |
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Lee Kohlmar as Prof. Ernst Einfeld |
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Lew Kelly as Det. Regan |
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E.H. Calvert as District Attorney |
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Wheeler Oakman as |
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Robert Frazier as |
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Cornelius Keefe as |
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John Davidson as |
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John Dilson as |
| Directing | Frank R. Strayer | Director |
| Production | Maury M. Cohen | Producer |
| Editing | Roland D. Reed | Editor |
| Writing | John W. Krafft | Screenplay |
| Writing | John W. Krafft | Story |
| Directing | Melville Shyer | Assistant Director |
| Crew | Jack Cosgrove | Special Effects |
| Art | Edward C. Jewell | Art Direction |
| Crew | L.E. Clark | Sound Recordist |
| Camera | M.A. Andersen | Director of Photography |
